Display system

1. A display system comprising: a display device configured to display a screen; and a plurality of electronic control units connected to a communication network, the electronic control units being configured to make the display device display the screen, wherein; the electronic control units include a first electronic control unit and a second electronic control unit; each of the electronic control units is configured to perform determination regarding whether or not operation information about the screen is a processing target of the electronic control unit, when the operation information is a processing target, perform control based on the operation information, and when the operation information is not a processing target, transmit, to other electronic control units, notification that the operation information is not a processing target as processing after the determination; the first electronic control unit is configured to acquire operation information on the screen; the first electronic control unit is configured to perform the determination on the operation information when the first electronic control unit makes the screen be displayed, in a case where the operation information is not a processing target of the first electronic control unit, set a transmission destination of the notification in the processing after the determination to the second electronic control unit and include the operation information in the notification, and when the second electronic control unit makes the screen be displayed, transmit the operation information to the second electronic control unit before the determination is performed; and the second electronic control unit is configured to perform the determination and the processing after the determination on the operation information received from the first electronic control unit.

2. The display system according to claim 1 , wherein the second electronic control unit is configured to set the transmission destination of the notification in the processing after the determination to the first electronic control unit, and the first electronic control unit is configured to, when the notification is received from the second electronic control unit, perform the determination and the processing after the determination on the operation information transmitted before the determination is performed.

3. The display system according to claim 1 , wherein the second electronic control unit is configured to perform the determination on the operation information transmitted before the first electronic control unit performs the determination, when the operation information is not a processing target of the second electronic control unit, set the transmission destination of the notification in the processing after the determination to the first electronic control unit, and transmit the operation information included in the notification to the first electronic control unit.

4. The display system according to claim 1 , wherein the electronic control units include the first electronic control unit and a plurality of second electronic control units, an order of transmission of the notification is set in advance to each of the electronic control units, and the notification in the processing after the determination including the operation information is transmitted according to the order to the electronic control units other than the electronic control unit that makes the screen be displayed.

5. The display system according to claim 1 , wherein the first electronic control unit is configured to generate a plurality of events upon reception of a result of an operation on the screen from an input device and handle each event as the operation information.

6. The display system according to claim 1 , wherein an input device that is provided to input the operation information is a switch.

7. The display system according to claim 6 , wherein the first electronic control unit is configured to generate an event according to a length of a time for pressing the switch.